How did two revolutions and a civil war bring about Communist control of Russia?
It seemed that both the revolutions and discord within Russia was the massive response to the removal of the autocratic government of the Czar. In attempting to articulate a new political reality for a nation that believed in despotism for centuries, there had to be a seismic shift in political voice. Communism represented a completely massive upheaval in this process. The failures of the Czar to hear out the calls for change as well as the heavy death and casualty toll that Russia endured in the First World War hastened his departure, and also set the stage for the political instability to follow. The fighting within the nation helped to highlight how difficult it was to move away from a vision of what Russians only knew to embracing a vision of the conditional tense.
The two revolutions and the civil war brought about communist control of Russia by destroying the Tsar's government and then by destroying the opposition to the communists.
In the February Revolution, the various factions that were opposed to the Tsar overthrew his government. This led to the governemnt of Kerensky. Then, the October Revolution overthrew that government.
From then, there was the long civil war between the Whites and the Reds tht ended up with the communists in complete control of the country.